Improved machine for forming elliptic springs



UNITED STATES PATENT OFFICE.

'J AMES l. CLEVELAND AND HENRY (j. .GUILDERSLEIVIL OF NEWARK, N. J.

IMPROVED MACHINE FOR FORMING ELLIPTIC SPRINGS.

Specification forming part ot' Letters Patent No. 104,114, dated June 14, 1870.

statement, reference being had to the accompanying drawing, which is lettered to correspond with and form a part of the speciiication.

Figure 1 is a perspective front view ot our machine. Fig. 2 is a perspective front elevation of the same, having all the top part and front spring-clamping bar or movable flange F removed, in order to show the arrangement of the spring-plates S S', vertical screw-jacks or spiral-grooved upright bars l 2 3 41l 5 6 7 with head-pieces H H H H H, pressure-bars and wheels W XV', horizontally-adjustable screwnuts n n a a, and adjustable end pieces, M M', to hold the dii-ferent lengths of plates S S' during the process ot' raising the same to any suitable curve. Fi 3 is avertical transverse section of our machine, showing the chairs or bed-pieces C C, which support the springplates S S', of any required width, and which are held in their places by the plates F F' F" by means ot the set-screws o o'.

This drawing also shows two sets ot' pressure-wheels, which tit into any curve of the spring-plates when operated by the action of the vertical pressure-bars :c ai ar, to which the wheels W' W' are attached.

In order to form or set up two sets of springplates at a time by our machine, we iirst raise up the levers L L', which cause the vertical pressure-bars x m to raise the pressure-wheels NV W W' W", Fig. 2, so as to allow the redhot plates S S' to be laid upon the chairs or beds O C between the clamping-bars F F' F", which are pressed up tight against the steel spring-plates by the set-screws o o o' o', after securing the ends ot' the plates by the adjustable end blocks, M M', Figs. l and 2. rlhe levers L L' are then loaded with any suitable weight-s r r, to produce a downward pressure upon the plates S S', after which the elevating-screws 1 2 3 4t 5 G 7 are turned up against the under side of spring-plates S S', to force the same upward, in order to obtain the required curve at the center of the plates or lifts, or at the ends thereof, as shown in the drawing.

XVe employ four sets of pressure-wheels, XV W W' NV', for the purpose of producing a more uniform downward pressure at any ofthe ditferent points of curvature that maybe required in the diii'erent-shaped carriage-springs.

Our machine is so constructed that all its parts are adapted to setting up or tting any of the different lengths or widths of springplates requiring any ot the different curves by the application of adjustable screw-jacks 1 2 3 4 5 6 7, and adjustable parallel bars me, and loaded levers L L', to produce the opposite pressures at the same time upon two sets of springs simultaneously by one and the same operation.

We do not confine ourselves to any .specific manner of horizontally adjusting the upper pressure-bars, .fr m' x', as pulleys, or a right and left handed screw-bar, or two right-handed screws may be employed, if preferred.

Te are aware that parallel upright bars and rollers are in common use for setting or itting spring-plates, hence these do not constitute our invention but the nature of our invention is the construction of a machine that will set up or form into any ot' the required curves two sets or parts of sets of elliptic spring-plates for carriages simultaneously, by means of horizontally-adjustable screw-jacks or spiralgrooved upright shafts 1 2 3 et and parallel drop-bars x fr x', which are also horizontally ad j usted from point to point, for the purpose ot' operating upon the spring-plates at said fixed points, and not to travel over the same during the operation of pressing.

The pressure-bars ac cc cc' x' are provided with loaded levers L L', to produce the opposite or downward pressure, together with the adjustable end blocks, M M', four sets of pressurewheels, NV W W' NV', and three clamping-bars or detached anges, F F' F", all secured, arranged, and operated as shown in the drawing 5 therefore,

lhat lWe claim as our improvement, and de- In testimony whereof We hereunto subscribe sire to secure by Letters Patent of the United our names in the presence of two Witnesses. States s- The7 eombix'lation of the adjustable serew- JAMES B. CLEVELAND. jacks l 2 3 4 5 6 7, adjustable pressure-bars x HENRY C. GUILDERSLElVE.

w x' x', levers L L', wheels WV lV, end blocks,

M M', adjustable nuts a u, head-pieces H H, Vitnesses:

clamping-bars F F F, and set-screws o o, all JAMEs P. MGLEAN, constructed, arranged, and operating in the EDWARD XV. HOTCHKISS. manner and for the purpose speeied. 

